It is important to know where all the electronic parts of a car are located. The diagnostic port of a 1999 Buick Century is on the driver's side, underneath dashboard, in the area under the steering wheel.
Left side bottom of dash, Is OBD-1.
Check the fuses. This vehicle should be OBD I.
Drivers side bottom of dash left or right side. Not exactly sure which side
under drivers side dash usually under steering wheel or near kick pannel
If they are the exact same engine (3800 tuned port injection) then yes.
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On my 1990 Buick Lesabre it is on the underside of the dash in the middle of the car. Go to you ash tray and look under the dash. There will be a rectangular hole through the plastic and the plug will be in there.
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